In December 2019, Jaiswal was named in India’s squad for the 2020 Under-19 Cricket World Cup. He became the leading scorer in the tournament, and scored a century against Pakistan in the semi-final.
In the 2020 IPL auction, he was bought by the Rajasthan Royals ahead of the 2020 Indian Premier League (IPL). He made his Twenty20 debut for the Rajasthan Royals in the 2020 IPL on 22 September 2020.